<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        html{
            font-size: 10px;
        }
        .container{
            display: flex;
            height: 40rem;
            background-color: aqua;
            /* flex-direction: culumn; */
            flex-wrap: wrap;
             /* justify-content: space-evenly; */
             align-items: self-end;
        }
        .item{
            width: 20rem;
            font-size: 8rem;
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="item" style="background-color: blue;">1</div>
        <div class="item" style="background-color: darkcyan;">2</div>
        <div class="item" style="background-color: red;">3</div>
        <div class="item" style="background-color: darkkhaki;">4</div>
        <div class="item" style="background-color: darkorchid;">5</div>
        <div class="item" style="background-color: salmon;">6</div>
    </div>
</body>
</html>